78478336758117 has 32 divisors (see below), whose sum is σ = 114944845547520. Its totient is φ = 47405758783680.

The previous prime is 78478336758097. The next prime is 78478336758121. The reversal of 78478336758117 is 71185763387487.

It is not a de Polignac number, because 78478336758117 - 2⁸ = 78478336757861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78478336758137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11020867 + ... + 16685807.

It is an arithmetic number, because the mean of its divisors is an integer number (3592026423360).

Almost surely, 2^{78478336758117} is an apocalyptic number.

It is an amenable number.

78478336758117 is a deficient number, since it is larger than the sum of its proper divisors (36466508789403).

78478336758117 is a wasteful number, since it uses less digits than its factorization.

78478336758117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5675553.

The product of its digits is 1327656960, while the sum is 75.

The spelling of 78478336758117 in words is "seventy-eight trillion, four hundred seventy-eight billion, three hundred thirty-six million, seven hundred fifty-eight thousand, one hundred seventeen".